JP5438915B2 - Architectural finishing coating material - Google Patents

Description

  The present invention relates to a building finish coating material used for an outer wall of a building and the like, and relates to a building finish coating material rich in design.

  Conventionally, in the production of architectural finishing coating materials, a surfactant such as a dispersant or a wetting agent is often used in order to disperse a filler such as calcium carbonate in the coating material (for example, Patent Document 1, Patent). Reference 2 and Patent Reference 3). However, these surfactants have a strong ability to penetrate human skin, and if they are ingested in large quantities, they may cause symptoms such as rough skin, eczema, and itching of workers who paint building finishes. there were.

JP-A-9-71752 (pages 2 and 3) Pamphlet of International Publication WO2002 / 83326 (2nd to 3rd pages) JP 2001-2978 A (pages 2 to 3)

  The problem to be solved is to reduce the amount of the surfactant used in the architectural finishing coating material in the architectural finishing coating material rich in design used for the outer wall of the building.

The invention according to claim 1 is an architectural finish coating material having a viscosity of 100 to 500 dPa · s when accommodated in a storage container, and the architectural finish coating material has an inorganic metal oxide or inorganic metal on the outer surface. the most important feature that the salt contains 7-50 wt% spherical synthetic resin filler coating material in the finish building the deposition averaged particle size 10~250μm a true specific gravity of from 0.20 to 0.50 was And

The invention described in claim 2 is characterized in that, in the invention described in claim 1, the spherical synthetic resin filler is hollow.

The invention according to claim 3 is characterized in that, in the invention according to claim 2 , an average shell thickness of the spherical synthetic resin filler is 2 to 30 μm.

According to the first aspect of the present invention, it is easy to form an uneven design on the coating film, and the amount of the surfactant used during manufacturing of the architectural finish coating material can be reduced , and the spherical shape can be reduced. There is an advantage that the scattering property of the synthetic resin filler is suppressed and the handling becomes easy .

According to the invention described in claim 2, there is advantage that can suppress the used amount of the thickener.

According to invention of Claim 2 , there exists an advantage that the heat insulation effect of a building finishing coating material becomes the optimal.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Embodiments of the invention will be described below with reference to FIGS.
The building finish coating material of the present invention is a spherical synthetic resin filler having an average particle diameter of 10 to 250 μm having a viscosity of 100 to 500 dPa · s when stored in a storage container and a true specific gravity of 0.20 to 0.50. it is necessary to contain 7-50% by weight in the construction topcoat material. The composition is as follows, for example.

  Composition example of architectural finish coating material of the present invention: 50 parts by mass of water as a diluent, 100 parts by mass of an acrylic resin emulsion as a binder, 10 parts by mass of an acrylic resin hollow body as a spherical synthetic resin filler, 1 mass of additive Department.

  The said storage container means the container for storing for a certain period in the state in which the building finishing coating material was accommodated. For example, metal containers such as Ito cans, round cans, square cans, and pail cans, plastic cans, plastic containers such as plastic bags, and paper containers such as paper bags.

  The time of accommodation means the state in which the building finishing coating material is accommodated in the storage container.

  The viscosity of the building finish coating material when stored in the storage container needs to be 100 to 500 dPa · s. When the viscosity is 100 to 500 dPa · s, it becomes easy to form an uneven design on the coating film. When the viscosity of the building finish coating material when stored in a storage container is less than 100 dPa · s, it is difficult to form an uneven design on the coating film, and conversely when it exceeds 500 dPa · s. Since the viscosity is too high, the construction becomes difficult.

  The viscosity of the building finish coating material when stored in a storage container is more preferably 150 to 350 dPa · s, and most preferably 200 to 300 dPa · s. When it is in this range, in the case of forming an uneven design on the coating film, the work is easy and the difference in coating thickness between the peak and valley portions of the uneven design is optimal. It is possible to suppress cracking of the coating film. In addition, when the viscosity is less than 150 dPa · s, conversely, when it exceeds 350 dPa · s, on the inner wall of the storage container, the building finish coating material tends to adhere to the inner wall, and only the surface layer of the building finish coating material A film is formed by drying (hereinafter referred to as “skinning”), and an architectural finish coating material layer is formed between the inner wall and the skinning. The architectural finish coating layer is fluid and the storage container is semi-sealed, so drying is slow, and this fluid state can be maintained for a long period of time and keep the skin on the surface. Have difficulty. As a result, when the storage container is opened, a part of the skin is dropped and mixed with the building finish coating material in the storage container. is there.

The thickener contained in the building finish coating material is preferably 0.010 to 0.001% by mass, more preferably 0.008 to 0.002% by mass, most preferably in terms of solid content. It is 0.006-0.003 mass%. When it exists in this range, moderate workability | operativity can be provided to a building finishing coating material. When the content of the thickener contained in the building finish coating material is less than 0.001% by mass in terms of solid content, water retention is insufficient and application workability may be deteriorated. On the contrary, when it exceeds 0.010 mass%, water retention is too high and drying of a building finish coating material may be slow.

  The composition of the spherical synthetic resin filler needs to be a synthetic resin. The composition of the spherical synthetic resin filler is a synthetic resin, so that water absorption and oil absorption on the surface are suppressed, so that the spherical synthetic resin filling out of water, organic solvents, etc. as a diluent in the composition of the building finish coating material Since there can be a lot of free diluent components (hereinafter referred to as “free water” in this composition example in the present embodiment) that are not trapped by the material, the dispersion of the filler is facilitated during the production of the building finish coating material. In addition, the amount of a surfactant such as a dispersant used can be suppressed. For the same reason, the amount of film-forming aid, antifreeze, etc. used can also be suppressed. In addition, since the composition of the spherical synthetic resin filler is a synthetic resin, it is richer in elasticity than metal and glass. The shape can be maintained by stirring with a mixer.

  Examples of the synthetic resin as the composition of the spherical synthetic resin filler include acrylic resin, vinyl chloride resin, ethylene resin, and propylene resin. Among these, it is preferable to use an acrylic resin. By using an acrylic resin, it is possible to obtain an architectural finish coating material that is rich in weather resistance and flexibility.

  The shape of the synthetic resin filler needs to be spherical, more preferably approximately spherical, and most preferably true spherical. Since the shape of the synthetic resin filler is spherical, the specific surface area is minimized so that a large amount of free water can be present, and the dispersion of the spherical synthetic resin filler during the production of building finish coating materials is facilitated. Thus, the amount of the surfactant used can be suppressed.

  The spherical synthetic resin filler needs to have an average particle size of 10 to 250 μm, preferably 20 to 200 μm, and most preferably 30 to 150 μm. When the average particle diameter of the spherical synthetic resin filler is 10 to 250 μm, the abundance ratio of free water is optimized. When the average particle diameter of the spherical synthetic resin filler is less than 10 μm, the relative surface area of the filler becomes too large and free water is reduced. On the other hand, if it exceeds 250 μm, the amount of free water will increase so much that the amount of excess free water will be increased if the binder is used as an emulsion that is a water dispersion. Becomes difficult.

  The spherical synthetic resin filler is preferably hollow. Since the spherical synthetic resin filler is hollow, the specific gravity of the filler is reduced, so that the risk of sedimentation of the filler in the building finish coating material is reduced, and the amount of thickener used can be suppressed. . Moreover, since the difference in refractive index is increased, the concealability of the coating film is improved, the amount of white pigment such as titanium oxide used can be suppressed, and a heat insulating effect can be obtained.

  When the spherical synthetic resin filler is hollow, the average particle diameter of the spherical synthetic resin filler is preferably 20 to 200 μm. When in this range, the thermal insulation effect of the building finish coating material is optimal. Since heat is transmitted by convection and conduction, the smaller the average particle size of the spherical synthetic resin filler, the longer the convection distance, and the better the heat insulating effect. However, when the average particle size of the spherical synthetic resin filler is less than 20 μm Since the hollow volume per unit volume of the spherical synthetic resin filler is reduced, the heat insulating effect is inferior. On the other hand, when the average particle diameter of the spherical synthetic resin filler exceeds 200 μm, the hollow volume per unit volume of the spherical synthetic resin filler increases, so that heat conduction due to convection is likely to occur and the heat insulation is poor.

The spherical synthetic resin filler is required to be contained in an architectural finishing coating material in an amount of 2 to 50% by mass, more preferably 5 to 30% by mass, and most preferably 7 to 20% by mass. When it is in this range, it is easy to impart an uneven design to the architectural finishing coating material, and the thickener contained in the architectural finishing coating material is less than 0.01% by mass in terms of solid content. However, it becomes easy to maintain the viscosity of 100 to 500 dPa · s when the building finish coating material is stored in the storage container.

The true specific gravity of the spherical synthetic resin filler is required to be 0.20 to 0.50, more preferably 0.20 to 0.40, most preferably 0.20 to 0.30. When it exists in this range, the usage-amount of the thickener in the composition of a building finishing coating material can be suppressed effectively. When the true specific gravity of the hollow spherical synthetic resin filler is less than 0.20 , the filler is too light, and dust scattering is likely to occur during the manufacture of building finish coating materials, affecting the health of workers. There is a fear. On the other hand, if it exceeds 0.50, the specific gravity is too heavy and the amount of thickener used cannot be effectively reduced. When the true specific gravity of the spherical synthetic resin filler is 0.20 to 0.40, the architectural finish coating material is sufficient on the inner wall of the storage container while the architectural finish coating material is accommodated in the storage container. Since it adheres with a sufficient thickness, drying of the surface of the building finish coating material can be suppressed, and the skinning is less likely to occur.

  When the spherical synthetic resin filler is hollow, the average shell thickness is preferably 2 to 30 μm, more preferably 4 to 20 μm, and most preferably 6 to 15 μm. By being in this range, the heat insulating effect of the building finish coating material is optimal. When the average shell thickness of the spherical synthetic resin filler is less than 2 μm, the shell is too thin and the shell is broken by an external impact such as stirring during the production of a building finish coating material, and the specific surface area increases. As a result, the effect of reducing the surfactant is diminished, and the heat insulation effect is reduced because it is no longer a closed cell. On the other hand, when it exceeds 30 μm, the shell is too thick and the hollow volume is reduced, so that the heat insulating effect is lowered.

  It is preferable that an inorganic metal oxide or an inorganic metal salt is adhered to the outer surface of the spherical synthetic resin filler. By coating the outer surface of the spherical synthetic resin filler with an inorganic metal oxide or inorganic metal salt, the scattering property of the spherical synthetic resin filler is suppressed, and handling is facilitated. Since the foaming at the time of manufacture of is suppressed, the usage-amount of an antifoamer can be suppressed.

  Examples of the inorganic metal oxide include alumina, titanium oxide, zinc oxide, magnesium oxide, and silica. Examples of the inorganic metal salt include calcium carbonate and barium sulfate. Among these, it is preferable to use one having a high surface hydrophilicity. By using a material with high surface hydrophilicity, it is excellent in miscibility of spherical synthetic resin fillers in the production of architectural finishing coating materials, and the amount of surfactants such as dispersants and wetting agents used in architectural finishing coating materials can be reduced. Can be suppressed. Among the inorganic metal oxides or inorganic metal salts, examples of those having high surface hydrophilicity include alumina, silica, calcium carbonate and the like. Of these, it is preferable to use calcium carbonate which is inexpensive and has a low environmental impact.

  The outer surface of the calcium carbonate is preferably supported with alumina, silica or the like in order to impart more hydrophilicity. By supporting alumina, silica or the like on the outer surface of the calcium carbonate, the hydrophilicity can be increased, so that the amount of the surfactant used can be further suppressed.

  The diluent is not limited to water, and can be arbitrarily used as long as it is used for ordinary paints such as alcohol and thinner.

  The binder is not limited to an acrylic resin emulsion, and may be used in a melted state in a solvent, or may be used as a powder. Moreover, if the composition is also used for a normal coating material, it can be used arbitrarily. For example, acrylic resin, vinyl acetate resin, vinyl chloride resin, versatic vinyl resin, urethane resin, silicone resin, fluorine resin, and the like can be given. These may be used alone or in combination. Further, monomers having two or more compositions may be copolymerized and used.

  The additive can be arbitrarily set as long as it is used in ordinary paints. For example, a preservative, an algae, a fiber, a coloring pigment, etc. are mentioned.

  Architectural finishing coating materials constructed as described above can be provided with irregular shapes on the surface and are lightweight, so that they have excellent workability and heat insulation, as well as surfactants, film-forming aids, and freeze protection. Since the amount of the agent used is suppressed, the risk of causing symptoms such as rough skin, eczema, and itching of an operator who paints a building finish coating material can be reduced.

The cross section of the coating film formed by the architectural finishing coating material configured as described above is, for example, as shown in FIG. In FIG. 1, for the sake of explanation, the spherical synthetic resin filler is drawn larger than the actual one and the content is sparsely drawn.

  As shown in FIG. 1, the coating film formed by the architectural finishing coating material of the present invention has the architectural finishing coating material layer 2 of the present invention formed on the surface of concrete 1 as a base material. The material layer 2 contains an acrylic resin hollow body 3 having an average particle diameter of 40 μm as a spherical synthetic resin filler. As shown in FIG. 2, calcium carbonate 5 as an inorganic metal salt adheres to the outer shell 4 of the acrylic resin hollow body 3.

This embodiment can exhibit the following effects.
-It becomes easy to form the design on an unevenness | corrugation in a coating film because the viscosity at the time of accommodation to the storage container of the said building finishing coating material is 100-500 dPa * s.

  -The composition of the spherical synthetic resin filler is a synthetic resin, which suppresses water absorption and oil absorption on the surface, thereby reducing the spherical synthesis among water, organic solvents, etc. as a diluent in the composition of building finishing coating materials. Since there can be a lot of free water that is not captured by the resin filler, it is easy to disperse the filler during the production of a building finish coating material, and the amount of surfactant such as a dispersant can be suppressed.

  ・ Since the shape of the synthetic resin filler is spherical, the specific surface area is minimized, so there can be a lot of free water, and the dispersion of the spherical synthetic resin filler during the production of building finish coating materials is easy. Thus, the amount of the surfactant used can be suppressed.

  -Since the average particle diameter of the said spherical synthetic resin filler is 10-250 micrometers, since the abundance ratio of free water becomes optimal, the usage-amount of surfactant can be suppressed.

  ・ Since the spherical synthetic resin filler is hollow, the specific gravity of the filler is reduced, so there is less risk of sedimentation of the filler in the building finish coating material, and the amount of thickener used is suppressed. Can do. Moreover, since the difference in refractive index is increased, the concealability of the coating film is improved, and the amount of white pigment such as titanium oxide used can be suppressed.

  -When the spherical synthetic resin filler is contained in the architectural finishing coating material in an amount of 2 to 50 mass%, the thickener contained in the architectural finishing coating material is less than 0.01 mass% in terms of solid content. Even if it exists, it becomes easy to hold | maintain the viscosity at the time of accommodation to the storage container of a building finishing coating material at 100-500 dPa * s.

-When the true specific gravity of the spherical synthetic resin filler is 0.20 to 0.50 , the amount of thickener used in the composition of the building finish coating material can be effectively suppressed.

  ・ By attaching an inorganic metal oxide or inorganic metal salt to the outer surface of the spherical synthetic resin filler, the scattering property of the spherical synthetic resin filler is suppressed, the handling becomes easy, and the production of the building finish coating material Since foaming at the time is suppressed, the amount of antifoaming agent used can be suppressed.

  -By using the inorganic metal oxide or inorganic metal salt having a high surface hydrophilicity, it is excellent in the miscibility of the spherical synthetic resin filler at the time of manufacturing the architectural finishing coating material, and is dispersed in the architectural finishing coating material. The amount of surfactants such as agents and wetting agents used can be suppressed.

  -It is preferable to support alumina, silica or the like on the outer surface of the calcium carbonate in order to impart more hydrophilicity. By supporting alumina, silica or the like on the outer surface of the calcium carbonate, the hydrophilicity can be increased, so that the amount of the surfactant used can be further suppressed.

In addition, the said embodiment of this invention can also be changed and comprised as follows.
In the above embodiment, the architectural finishing coating material layer 2 is directly provided on the concrete 1 as the base material. However, a primer layer may be provided between the base material and the architectural finishing coating material layer 2.

  When comprised in this way, since it can suppress the water absorption to the concrete 1 as a base material when constructing a building finishing coating material, it is excellent in painting workability and can suppress cracking of the building finishing coating material. it can.

  Next, technical ideas other than the invention described in the claims ascertained from the embodiment will be described together with their effects.

The architectural finishing coating material according to claim 3, wherein the inorganic metal salt is selected from alumina, silica, and calcium carbonate.
When configured in this way, due to the hydrophilicity of the inorganic metal salt, it is excellent in the miscibility of the spherical synthetic resin filler at the time of production of the architectural finish coating material. The amount used can be suppressed.

Hereinafter, the remarkable effect of the present invention as compared with the prior art will be described by comparative tests on the examples.
The test was performed by manufacturing the architectural finishing coating materials of Examples and Comparative Examples and observing the properties of the coating materials. At the same time, the ironing workability and spraying workability of the coating material were also confirmed. The iron coating was evaluated by applying to the slate plate with a square hook, and the spraying was evaluated using a lysing gun.

Example 1
The composition of the building finishing coating material of Example 1 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and a calcium carbonate-supported acrylic resin hollow body (true specific gravity 0.2) as a spherical synthetic resin filler. , Average particle diameter 40 μm) 20 parts by mass.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 110 dPa · s. When the finished coating material was coated on a slate plate, it was light and smooth, and the spraying workability was also good.

(Example 2)
The composition of the building finishing coating material of Example 2 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and a calcium carbonate-supported acrylic resin hollow body (true specific gravity 0.2) as a spherical synthetic resin filler. , Average particle diameter 40 μm) 20 parts by mass, thickener 0.008 parts by mass.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 117 dPa · s. When the finished coating material was coated on a slate plate, it was light and smooth, and the spraying workability was also good.

(Example 3)
The composition of the building finishing coating material of Example 3 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and a calcium carbonate-supported acrylic resin hollow body (true specific gravity 0.2) as a spherical synthetic resin filler. , Average particle diameter 40 μm) 2 parts by mass.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 103 dPa · s. When the finished coating material was coated on a slate plate, it was light and smooth, and the spraying workability was also good.

(Reference Example 1)
The composition of the architectural finish coating material of Reference Example 1 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and an acrylic resin hollow body (true specific gravity 0.1, average particle) as a spherical synthetic resin filler. (Diameter 40 μm) 70 parts by mass, 0.1 parts by mass of surfactant, 10 parts by mass of water as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 486 dPa · s. When the finished coating material was coated on a slate plate, it was light and smooth, and the spraying workability was also good.

Example 4
The composition of the building finish coating material of Example 4 is 160 parts by mass of an acrylic-silicone copolymer resin emulsion (solid content 50% by mass) as a binder, and a calcium carbonate-supported acrylic resin hollow body (true) as a spherical synthetic resin filler. Specific gravity 0.2, average particle diameter 40 μm) 70 parts by mass, surfactant 0.1 part by mass, water 10 parts by mass as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 404 dPa · s. When the finished coating material was coated on a slate plate, it was light and smooth, and the spraying workability was also good.

(Example 5)
The composition of the building finish coating material of Example 5 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and an alumina-supported acrylic resin hollow body (true specific gravity 0.2, as a spherical synthetic resin filler). (Average particle diameter 80 μm) 70 parts by mass, 0.1 parts by mass of a surfactant, 10 parts by mass of water as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 421 dPa · s. When the finished coating material was coated on a slate plate, it was light and smooth, and the spraying workability was also good.

(Example 6)
The composition of the building finishing coating material of Example 6 is 160 parts by mass of a styrene-acrylic copolymer resin emulsion (solid content 50% by mass) as a binder, and a calcium carbonate-supporting acrylic resin hollow body (true) as a spherical synthetic resin filler. Specific gravity 0.2, average particle diameter 120 μm, average shell thickness 10 μm) 70 parts by mass, surfactant 0.1 part by mass, water 10 parts by weight as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 398 dPa · s. When the finished coating material was coated on a slate plate, it was light and smooth, and the spraying workability was also good. The thermal conductivity of the coating film at this time was 0.08 W / K · m.

(Reference Example 2)
The composition of the architectural finishing coating material of Reference Example 2 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and a spherical acrylic resin (true specific gravity 0.4, average particle diameter) as a spherical synthetic resin filler. 200 μm) 70 parts by mass.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 250 dPa · s. When the finished coating material was coated on a slate plate, the workability was smooth and the spraying workability was also good.

(Example 7)
The composition of the building finish coating material of Example 7 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and alumina-supported spherical acrylic resin (true specific gravity 0.4, average) as a spherical synthetic resin filler (Particle diameter 200 μm) 70 parts by mass.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 216 dPa · s. When the finished coating material was coated on a slate plate, the workability was smooth and the spraying workability was also good.

(Example 8)
The composition of the building finish coating material of Example 8 was 160 parts by mass of a styrene-acrylic copolymer resin emulsion (solid content 45% by mass) as a binder, and a calcium carbonate-supporting acrylic resin (true specific gravity 0) as a spherical synthetic resin filler. .4, average particle diameter 100 μm, average shell thickness 1.0 μm) 70 parts by mass, surfactant 0.1 parts by mass, and 10 parts by mass of water as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 370 dPa · s. When the finished coating material was coated on a slate plate, the workability was smooth and the spraying workability was also good. The thermal conductivity of the coating film at this time was 0.48 W / K · m.

Example 9
The composition of the architectural finish coating material of Example 9 is 160 parts by mass of a styrene-acrylic copolymer resin emulsion (solid content 45% by mass) as a binder, and a calcium carbonate-supporting acrylic resin (true specific gravity 0) as a spherical synthetic resin filler. .4, average particle diameter 100 μm, average shell thickness 25 μm) 70 parts by mass, surfactant 0.1 part by mass, and 10 parts by mass of water as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 350 dPa · s. When the finished coating material was coated on a slate plate, the workability was smooth and the spraying workability was also good. The thermal conductivity of the coating film at this time was 0.25 W / K · m.

(Example 10)
The composition of the building finish coating material of Example 10 is 160 parts by mass of a styrene-acrylic copolymer resin emulsion (solid content 45% by mass) as a binder, and a calcium carbonate-supporting acrylic resin (true specific gravity 0) as a spherical synthetic resin filler. .4, average particle diameter 100 μm, average shell thickness 5 μm) 70 parts by mass, surfactant 0.1 parts by mass, and 10 parts by mass of water as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 350 dPa · s. When the finished coating material was coated on a slate plate, the workability was smooth and the spraying workability was also good. The thermal conductivity of the coating film at this time was 0.21 W / K · m.

(Comparative Example 1)
The composition of the architectural finishing coating material of Comparative Example 1 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and 20% by mass of calcium carbonate (true specific gravity 2.6, average particle size 40 μm) as a filler. Department.

  As a result of the test, in the building finishing coating material, calcium carbonate was precipitated, and the viscosity at the time of production was 20 dPa · s. When the finished coating material was coated on a slate plate, it was difficult to apply it due to dehydration, and dripping occurred when sprayed.

(Comparative Example 2)
The composition of the architectural finish coating material of Comparative Example 2 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder, and 20% by mass of calcium carbonate (true specific gravity 2.6, average particle size 40 μm) as a filler. Parts, thickener 0.008 parts by mass.

  As a result of the test, in the building finishing coating material, calcium carbonate was precipitated, and the viscosity at the time of production was 21 dPa · s. When the finished coating material was coated on a slate plate, it was difficult to apply it due to dehydration, and dripping occurred when sprayed.

(Comparative Example 3)
The composition of the architectural finishing coating material of Comparative Example 3 is 160 parts by mass of an acrylic resin emulsion (solid content 50% by mass) as a binder and 70 parts by mass of alumina (true specific gravity 4.0, average particle diameter 80 μm) as a filler. , 0.1 part by weight of a surfactant, 10 parts by weight of water as a diluent.

  As a result of the test, alumina was precipitated in the building finishing coating material, and the viscosity at the time of production was 18 dPa · s. When the finished coating material was coated on a slate plate, it was difficult to apply it due to dehydration, and dripping occurred when sprayed.

(Example 11)
The composition of the building finish coating material of Example 11 is 160 parts by mass of a styrene-acrylic copolymer resin emulsion (solid content 45% by mass) as a binder, and a calcium carbonate-supporting acrylic resin (true specific gravity 0) as a spherical synthetic resin filler. 0.4, average particle diameter 100 μm, average shell thickness 40 μm) 70 parts by mass, surfactant 0.1 parts by mass, water 10 parts by mass as a diluent.

  As a result of the test, the building finish coating material was able to be produced normally, and the viscosity at the time of production was 350 dPa · s. When the finished coating material was coated on a slate plate, the workability was smooth and the spraying workability was also good. The thermal conductivity of the coating film at this time was 0.54 W / K · m.

(Comparative Example 4)
The composition of the architectural finish coating material of Comparative Example 4 is 160 parts by weight of a styrene-acrylic resin emulsion (solid content 50% by mass) as a binder, and a calcium carbonate-supporting acrylic resin hollow body (true true gravity 0) as a spherical synthetic resin filler. .2, average particle diameter 350 μm) 70 parts by mass. Surfactant 0.1 part by weight, water 10 parts by weight as a diluent.

  As a result of the test, a part of the acrylic resin hollow body settled in the building finishing coating material, and the viscosity at the time of production was 50 dPa · s. When the finished coating material was applied to a slate plate with a soldering iron, it was difficult to apply, and when sprayed, sagging occurred.

In addition, the technical idea described in the present specification was created by the following inventors.
The technical idea described in paragraph numbers [0001] to [0088] was created by Junichi Kato. The author of the claims and specification attached to the application is Shinichi Kato.

It is the schematic cross section which showed the example of the architectural finishing coating material layer of this invention. It is the schematic cross section which showed the example of the spherical synthetic resin filler contained in the building finishing coating material layer of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Concrete 2 Coating finishing coating layer 3 Spherical synthetic resin filler 4 Outer shell of spherical synthetic resin filler 5 Calcium carbonate

Claims (3)

An architectural finishing coating material having a viscosity of 100 to 500 dPa · s when accommodated in a storage container, wherein the architectural finishing coating material has an true specific gravity of 0. A building finishing coating material comprising 7 to 50% by mass of a spherical synthetic resin filler having an average particle size of 10 to 250 μm of 20 to 0.50 in the building finishing coating material. The architectural finishing coating material according to claim 1 , wherein the spherical synthetic resin filler is hollow. The building finishing coating material according to claim 2 , wherein the spherical synthetic resin filler has an average shell thickness of 2 to 30 μm.

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